Home / 20,965.79-31,400.07-12,627.59

Finding the Fourth Proportional to 20,965.79, 31,400.07 and 12,627.59

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Solution

The fourth proportional to 20,965.79, 31,400.07 and 12,627.59 is: 18,912.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.79 : 31,400.07 = 12,627.59 : x
  2. Step 2: Convert to fraction form
    20,965.79/31,400.07 = 12,627.59/x
  3. Step 3: Cross multiply
    20,965.79x = 31,400.07 × 12,627.59
  4. Step 4: Simplify right side
    20,965.79x = 396,507,052.93
  5. Step 5: Solve for x
    x = 396,507,052.93/20,965.79
  6. Step 6: Final answer
    x = 18,912.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.